I think some would say this of my DH. He regularly works from home, and often just takes a morning off, or can be seen pacing the floor, or just talking on the phone.
He's lucky and clever. He has a particular set of IT skills, and excellent people skills, and just went for the right jobs (and was head hunted because he is very specialised now) - in finance companies, which is where the money is. He did do IT in Telecoms before, and didn't earn nearly as much.
Plus, he always asked for more money at interview. Huge increases in fact - I don't know how he had the nerve- I wouldn't. Last salary increase was over 30k.
But when he's pacing, he's thinking and planning. When he's working from home, it's because he has to get something specific done, and is under pressure. He also has the late night phone calls with the USA, and has to go away, often on short notice, for example, he missed DS2's birthday last year because he had to go to the USA.
I wouldn't like to say how that compares to say, a nurse in A&E, or a fire fighter, or a policeman, or teachers - I don't think he works harder than any of those. I guess it's a bit of a sad indictment on society that those publicly funded roles don't get higher salaries.